CVE-2026-44697 Klever-Go MultiDataInterceptor: remote OOM via crafted compressed P2P payload
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-44697?
CVE-2026-44697 is a high-severity vulnerability in klever-io klever-go, published on 29 May 2026.
Official description
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.17, a remote, unauthenticated denial-of-service vulnerability in Batch.Decompress (data/batch/batch.go) allows any peer that participates in a topic served by MultiDataInterceptor to allocate multi-gigabyte heaps on the receiving node from a sub-50 KiB gossip payload. A single packet is sufficient to OOM-kill a validator with conventional memory provisioning. Fleet-wide application affects chain liveness. This vulnerability is fixed in 1.7.17.
Which versions are affected by CVE-2026-44697?
3 open source packages ship an affected version, including github.com/klever-io/klever-go.
| Package | Affected | Fixed in |
|---|---|---|
github.com/klever-io/klever-go Go | All versions | None |
github.com/klever-io/klever-go Go | All versions to 1.7.16 | None |
github.com/klever-io/klever-go Go | All versions to 1.7.16 | None |
How do I fix CVE-2026-44697?
Upgrade to a fixed version.
Is CVE-2026-44697 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44697 exists.
Sources
Also known as GHSA-87m7-qffr-542v, GO-2026-5246.